Remove unused wait events.

Amit Kapila · Amit Kapila · commit 1607cd0b6c99 · 2021-10-21T08:01:25.000+05:30
Commit 4648243 introduced the wait events which were neither used by that commit nor by follow-up commits for that work. Author: Masahiro Ikeda Backpatch-through: 14, where it was introduced Discussion: https://postgr.es/m/ff077840-3ab2-04dd-bbe4-4f5dfd2ad481@oss.nttdata.com
diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml
@@ -1549,22 +1549,6 @@ postgres   27093  0.0  0.0  30096  2752 ?        Ss   11:34   0:00 postgres: ser
       <entry><literal>WALWrite</literal></entry>
       <entry>Waiting for a write to a WAL file.</entry>
      </row>
-     <row>
-      <entry><literal>LogicalChangesRead</literal></entry>
-      <entry>Waiting for a read from a logical changes file.</entry>
-     </row>
-     <row>
-      <entry><literal>LogicalChangesWrite</literal></entry>
-      <entry>Waiting for a write to a logical changes file.</entry>
-     </row>
-     <row>
-      <entry><literal>LogicalSubxactRead</literal></entry>
-      <entry>Waiting for a read from a logical subxact file.</entry>
-     </row>
-     <row>
-      <entry><literal>LogicalSubxactWrite</literal></entry>
-      <entry>Waiting for a write to a logical subxact file.</entry>
-     </row>
     </tbody>
    </tgroup>
   </table>
diff --git a/src/backend/utils/activity/wait_event.c b/src/backend/utils/activity/wait_event.c
@@ -717,18 +717,6 @@ pgstat_get_wait_io(WaitEventIO w)
 		case WAIT_EVENT_WAL_WRITE:
 			event_name = "WALWrite";
 			break;
-		case WAIT_EVENT_LOGICAL_CHANGES_READ:
-			event_name = "LogicalChangesRead";
-			break;
-		case WAIT_EVENT_LOGICAL_CHANGES_WRITE:
-			event_name = "LogicalChangesWrite";
-			break;
-		case WAIT_EVENT_LOGICAL_SUBXACT_READ:
-			event_name = "LogicalSubxactRead";
-			break;
-		case WAIT_EVENT_LOGICAL_SUBXACT_WRITE:
-			event_name = "LogicalSubxactWrite";
-			break;
 
 			/* no default case, so that compiler will warn */
 	}
diff --git a/src/include/utils/wait_event.h b/src/include/utils/wait_event.h
@@ -221,11 +221,7 @@ typedef enum
 	WAIT_EVENT_WAL_READ,
 	WAIT_EVENT_WAL_SYNC,
 	WAIT_EVENT_WAL_SYNC_METHOD_ASSIGN,
-	WAIT_EVENT_WAL_WRITE,
-	WAIT_EVENT_LOGICAL_CHANGES_READ,
-	WAIT_EVENT_LOGICAL_CHANGES_WRITE,
-	WAIT_EVENT_LOGICAL_SUBXACT_READ,
-	WAIT_EVENT_LOGICAL_SUBXACT_WRITE
+	WAIT_EVENT_WAL_WRITE
 } WaitEventIO;
 
 
